Update release notes for 3.4.2

- Add Trust Level epic to the release notes

Issue-ID: CPS-2024
Change-Id: Ie5425bca6e3d48b957c703af50c7542c4401d1b4
Signed-off-by: halil.cakal <halil.cakal@est.tech>
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index c850065..3fb77cb 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -43,6 +43,7 @@
 
 Features
 --------
+    - `CPS-1638 <https://jira.onap.org/browse/CPS-1638>`_ Introduce trust level for CM handle.
     - `CPS-1795 <https://jira.onap.org/browse/CPS-1795>`_ Double performance of CPS write operations (via write batching)
     - `CPS-2018 <https://jira.onap.org/browse/CPS-2018>`_ Improve performance of CPS update operations.
     - `CPS-2019 <https://jira.onap.org/browse/CPS-2019>`_ Improve performance of saving CM handles.